899391 has 8 divisors (see below), whose sum is σ = 1203760. Its totient is φ = 597312.

The previous prime is 899387. The next prime is 899401. The reversal of 899391 is 193998.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 899391 - 2² = 899387 is a prime.

It is a Duffinian number.

899391 is a lucky number.

It is a plaindrome in base 8.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 861 + ... + 1593.

It is an arithmetic number, because the mean of its divisors is an integer number (150470).

2⁸⁹⁹³⁹¹ is an apocalyptic number.

899391 is a deficient number, since it is larger than the sum of its proper divisors (304369).

899391 is a wasteful number, since it uses less digits than its factorization.

899391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145.

The product of its digits is 17496, while the sum is 39.

The square root of 899391 is about 948.3622725520. The cubic root of 899391 is about 96.5271563973.

It can be divided in two parts, 8 and 99391, that added together give a palindrome (99399).

The spelling of 899391 in words is "eight hundred ninety-nine thousand, three hundred ninety-one".